Gas burner for furnaces



i 1930- R. B. FANNING 1,760,858

GAS BURNER FOR FURNACES Filed Jan. 13, 1928 2 Sheets-Sheet 1 20mm: 0/7/717 J May 27, 1930. R. B. FANNING GAS BURNER FOR FURNACES 2 Sheet-Sheet 2 Filed Jan. 13, 1928 HIIIIII Faber/1557001)) gmyqw Patented May 27, 1930 BERT EARNING, THURBER, TEXAS ens BURNER roe FURNACES Applicati-omfiled January '13, 1928,. Serie1 No-.- 246,573.

This invention relates to. improvements, in gas burnersforifurnaces and has as one ofits objects to. provide a burner, designed primarilyforuse in connection with commercial 5 furnaces and so constructed as to provide for a thorough mixtureoi the gas and air thus insuring or complete combustion of the "gas and obviating waste, .as well as insuring of amore efficient-operation of the burner.

Another object of the invention is to provide aburner. ot tlie class described so constructedthat there will'be no likelihoodof back-fire in the operation of the burner.

Another object'of the invent-ion is to pro eluding-a mixing chamber into which the gas supply nozzle extends, novel means for controlling the admission of air to the chamber in such a manner thatair may be admitted Q to the chamber from either side thereof, to

the exclusion of the other side, or to the chamber at both sides thereof, depending upon the direction of the wind, where the burner 1s propersupply of air to the mixing chamber to support combustion of the gaseous fuel at the burner nozzles and, at'the'same time, pre cluding the entry ofblasts of air into the-mixingchamber which would tend to deflect the flame and render the action ofthe burner non-uniform, the invention contemplating, in this respect, the provision of a burner so constructed thatitwill deliver amaximum heat for an indefinite period o-E time and eta uniform degree of temperature.

Another object of the invention is to so construct theburner that the gas will be supplied thereto from two nozzles, so relativelyarranged as to insure of thorough GOHlbUStlOIl' of the fuel and likewise permit of regulation of the burner to vary the degree'of heat and thus insure of a more proper heating of the apparatus in connection with which the furnaee, supplied by the burner,-is installed, and

without any waste of fuelor heat units.

WVhile the accompanying drawings the description which is to follow, constitute disclosure ofthe preferred embodiment of the invention, it will be understood'that vari:

vide, ina burner of the class referred to, in-v located outdoors, thus providing for the ouschangesmaybe made within, the scope of what is claimed.- 7

lnthe accompanying, drawings: Figure-1 is; atop; plan view oftheburnen embodying the invention;

l ligu-re 2 is a 'SlClBi'BlBVittlOIl of the burner; i h igure 3 is averticaltransverse sectional view taken substantially onrthe line 3-3 of: Figure 1 looking in the direction indicated by the arrows; i F'gure 4: is a vertical longitudinal sectional view through the 'burnertak'en' substantially on the line l V4c:of l5igure 1 lookingun' the direction indicatedby'the arrowsg; w

F gure 5 is a rear elevation of thebnrnen; Figure 6 is a vertical transverse sectional; view taken substantially: on the line. 6 6 of Figure 2" looking in the direction indicated by the arrows; V

Figure-'7 is a vertical transverse sectional viewtaken substantially on the line 7 7 of; Figure 4 looking in the direction indicated by the arrows. T T

The" burner embodying theinvention, in cludes, in its construction, a mixing chamber which is indicated in general by the numeral 1 and which may be cast from any metal oapable of withstandin the heat generated by the burner, and the body of the mixing chamher comprises sidewalls-2, top and bottoin walls 3 and 4, and a rear wall 5, the chamber being of substantially frusto-pyramidal form V andits closed end being its major end: Inorder that the flame propagated by the burner may be delivered into the furnace in the wall of which the mixing chamber is arranged, the said chamber is provided at its minor or forward end with a nozzle 6-which is likewise of cast metal and which maybe either integrally formed'with therbody of the mixing chamber or formed separate therefrom and separably connected therewith in minor end united to the minorend oif 'the mixing chamber.

lhe'burner proper is indicated in general by the numeral 7 Y and the same comprises burner nozzles 8 and 9 which are fitted throughthe rear-wall 5 of the mixing chamdownwardly and upwardly, as clearly shown ber, the nozzle 8 being located in a vertical plane with and above'the nozzle 9 and the said nozzles 8 and 9 being, respectively, curved in Figure 4 of the drawings, it being observed, by reference to this figure, that the delivery end of the nozzle 8 terminates above and somewhat in rear of the delivery end of the nozzle 9. The nozzles 8 and 9 are connected at their intake ends with the casings of cut-0E valves indicated respectively by the numerals 10 and 11, which valves are located in rear of the said mixing chamber 1, and the valve bodies are provided with operating handles 12 and 13 respectively whereby the fireman may readily control the delivery of gaseous fuel to the nozzles 8 and 9 independently of each other. A T-coupling 14: has its intermediate branch connected to the casing of the valve 10 at the intake side of said casing, and an elbow 15 is connected to the lower branch of the T-coupling and to the intake side of the casing of the valve 11, the gas supply pipe (not shown) being connected to the upper branch of the said T-coupling whereby to'supply gaseous fuel to the valves 10- and 11 "and by way of these valves, in regulated quantities, to the nozzles 8 and 9. At this point, and by particular reference to .Figure 4 of the drawings, it will be evident that the ets of gas, under pressure, will be caused to mixupon opening of the control valves for the nozzles 8 and 9, the jet from the nozzle 8 striking the jet from the nozzle 9 thus causing the jets tobe broken up in a. manner to provide for a more thorough mixture of the gaseous fuel with the air which is taken into the mixing chamber in a manner and under conditions to be presently described.

In order that air may be admitted, in the proper quantity, into the mixing chamber 1, the side walls 2 of said chamber are formed, near their rear ends, and directly opposite the nozzles 8 and 9, with air inlet openings 16 which are preferably rectangular as illusdampers comprises a quadrangular sheet metal body 18 which is hingedly mounted at its forward end as at 19, upon the respective side wall 2 of the mixing chamber 1, the hinges 19 being located forwardly of the air inlet openings 16 and the said body plates 18 of the dampers being'of substantially the same marginal contour and dimensions as the rear portions of the said side walls 2 of the mixing chamber 1. Each damper 17 further includes top and bottom wings indicated respectively by the numerals 20 and 21, and these wings occupy'the same planes as the upper and lower edges of the body 18 of the damper and are therefore located in planes converging in the direction of the hinged forward ends of the respective dampers, so that, when the dampers are in closed position or in other words in position resting directly against the outer surfaces of the respective side walls 2 of the mixing chamber, the wings 20 and 21 will respectively overlie and underlap the top and bottom walls of said chamber and, when either damper is partly open, the wings will'partly extend over the respective topor bottom walls of the mixing chamber as illustrated in broken lines in Figure 1 of the drawings, so as to concentrate the draft orrair currents entering the respective draft opening '16. By reference to Figures 1, 2, 4E and 5 of the drawings, it will be observed that the body plates 18 of the dampers 17 are extended rearwardly so asto provide other wings indicated by the numeral 22 which are positioned at an obtuse angle to the said body plates of the respective dampers and consequently converged toward each other, in the completely closed positions of the two dampers as shown in Figure 1.

These wings 22 extend a sufficient distance beyond the rear-ends of the body plates 18 of the respective dampers'to lie at the respective sides of the burner valves when either damperis in closed position, and assuming north, it will be evident that the damper at the north side of the mixing chamber may be completely closed and the damper at the south side partly opened, so that the rapidly moving atmospheric currents will strike the wing 22 of the last mentioned damper and the desired volume of air will be directed by this damper and its said wings 22 and 20 and 21, into the mixing chamber through the re spective draft opening 16 thus insuring of an adequate supply of air to the burner nozzles to insure of'perfect combustionof the gaseous fuel, and, at the same time, effecting a direction of the flames from the burner directly toward the nozzle 6 and thereby preventing any back-firing or back-draft which would impair the efficiency of the burner.

From the foregoing description of the invention it will be evident that the fireman in charge of the furnace equipped with the burner of the present invention, may conveniently adjust the valves which control the supply of gaseous fuel to the nozzles 8 and 9, by manipulating the handles 12 and 13, to insure of the supply of precisely the necessary quantity of fuel to the burner nozzles to produce the desired temperature in the furnace in connection with which the burner is installed, and it will furthermore be evident that due to the peculiar arrangement of the burner nozzles and particularly the arrangement of their delivery ends with respect to a ing chamber having an air inlet, means for controlling the admission of air through said inlet, burner nozzles extending into the chamber opposite the air inlet and having their delivery ends curved toward each other and presented in proximity to each other, the said delivery end of one nozzle being displaced rearwardly with respect to the delivery end of the other nozzle, and means for supplying a gaseous fuel to said nozzles.

2. In a burner of the class described, a mixing chamber having an air inlet, means for controlling the admission of air through said inlet, burner nozzles extending into the chamber opposlte the air inlet and having their delivery ends curved toward each other and presented in proximity to each other, the said delivery end of one nozzle being displaced rearwardly with respect to the delivery end of the other nozzle, means for supplying a a gaseous fuel to said nozzles, and a manually adjustable control valve for controlling the supply of gaseous fuel to each of said nozzles independently of the other nozzle.

3. In a burner of the class described, a mixing chamber having an air inlet, means for controlling the admission of air through said inlet, burner nozzles extending into the chamber one above the other and having their delivery ends located substantially opposite the said air inlet, the delivery and of the upper nozzle being directed forwardly and downwardly, the delivery end of the lower nozzle being directed forwardly and upwardly and located in advance of the delivery end of the first mentioned nozzle, and means for supplying a gaseous fuel to said nozzles.

4. In a burner of the class described, a mixing chamber having air inlet openings in its opposite side walls, the chamber being of approximately frusto-pyramidal form, a burner nozzle extending into the rear end of the chamber with its delivery end located approximately opposite the said openings in said side walls of the chamber, and means for controlling the passage of air into the from the upper and lower edges of said plate and respectively above and below the top and bottom walls of the chamber, and a wing extending from the rear end'of the body of each damper between the first mentioned wings and rearwardly beyond the same.

5. In a burner of the class described, a mixing chamber having air inlet openings in its opposite side walls, the chamber being of approximately frusto-pyramidal form, a burner nozzle extending into the rearend of the chamber with its delivery end located approximately opposite the said openings in said side walls of the chamber, and means for controlling the passage of air into the mixing chamber by way of said openings, the said means comprising a damper plate hingedly mounted upon each side wall of the mixing chamber, wings extending inwardly from the upper and lower edges of said plate and respectively above and below the top and bottom walls of the chamber, and a wing extending from the rear end of the body of each damper between the first mentioned wings and rearwardly beyond the same, the last mentioned wings occupying planes at an obtuse angle to'the planes of the body plates of the respective dampers.

6. In a burner of the class described, a mixing chamber of substantially frusto-pyramidal form closed at its major end and having air inlet openings in its opposite side walls, a flame nozzle of frusto-pyramidal form con-' nected at its minor end to the minor end of the said mixing chamber and extending forwardly therebeyond and having its major end open, the opposite side walls of the mixing chamber having air inlet openings therein, dampers mounted for angular adjustment upon the outer sides of the said opposite walls of the mixing chamber and adjustable to control the supply of air through said air inlet openings, a burner nozzle extending into the major end of the mixing chamber with its delivery end located opposite the said openings, and means for supplying a gaseous fuel to said burner nozzle. 7 I

In testimony whereof I afix my signature.

ROBERT BERT FANNING. 

